Campbell Barton
27da305a40
Avoid computationally expensive copying operations when only some settings have been modified. This is done by adding support for updating parameters without tagging for copy-on-write. Currently only mesh data blocks are supported, other data-blocks can be added individually. This prepares for changing values such as edit-mesh auto-smooth angle in edit-mode without duplicating all mesh-data. The benefit will only be seen when the user interface no longer tags all ID's for copy on write updates. ID_RECALC_GEOMETRY_ALL_MODES has been added to support situations where non edit-mode geometry is modified in edit-mode. While this isn't something user are likely to do, Python scripts may change the underlying mesh. Reviewed By: sergey Ref D11377